Datasheet

AD7329 Data Sheet
Rev. B | Page 14 of 40
–50
–90
10
1000
05402-022
ANALOG INPUT FREQUENCY (kHz)
THD (dB)
SINGLE-ENDED MODE
V
DD
= 12V, V
SS
= –12V
V
CC
= V
DRIVE
= 5V
INTERNAL REFERENCE
AD8021 BETWEEN MUX
OUT
+
AND ADC
IN
+ PINS
100
R
IN
= 2000Ω
R
IN
= 1000Ω
R
IN
= 600Ω
R
IN
= 100Ω
R
IN
= 50Ω
±2.5V RANGE
R
IN
= 2000Ω
R
IN
= 1000Ω
R
IN
= 600Ω
R
IN
= 100Ω
R
IN
= 50Ω
±10V RANGE
–55
–60
–65
–70
–75
–80
–85
Figure 22. THD vs. Analog Input Frequency for Various Source Impedances,
Single-Ended Mode
–76
–88
±5
±17
05402-055
SUPPLY VOLTAGE (V) (V
DD
= +, V
SS
=
–)
THD (dB)
30kHz/1MSPS
10kHz/1MSPS
30kHz/500kSPS
10kHz/500kSPS
±5V RANGE
V
CC
= V
DRIVE
= 5V
INTERNAL REFERENCE
SINGLE-ENDED MODE
AD8021 BETWEEN MUX
OUT
+
AND ADC
IN
+ PINS
–78
–80
–82
–84
–86
±7 ±9
±11
±13 ±15
Figure 23. THD vs. Supply Voltage at 500 kSPS and 1 MSPS
with 10 kHz and 30 kHz Input Tone